<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>页面未找到</title>
    <style>
        body {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
            font-family: Arial, sans-serif;
            background-color: #f5f5f5;
        }
        .container {
            text-align: center;
        }
        .error-code {
            font-size: 72px;
            font-weight: bold;
            margin-bottom: 20px;
        }
        a {
            color: #3498db;
            text-decoration: none;
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="error-code">404</div>
        <p>页面未找到</p>
        <a href="/">返回首页</a>
    </div>
</body>
</html>